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About

A. Carnero Rosell is a key figure in modern cosmology, specializing in large-scale structure analysis and the mitigation of systematic effects in spectroscopic surveys. Their primary research focuses on the Dark Energy Spectroscopic Instrument (DESI), where they have made critical contributions to understanding and correcting for fiber assignment incompleteness—a hardware limitation that biases galaxy clustering measurements. In their highly cited 2025 work (25 citations), Carnero Rosell developed methods to produce alternate realizations of DESI’s fiber assignment, enabling unbiased clustering measurements crucial for probing dark energy. A companion 2025 study (20 citations) provided an in-depth characterization of this incompleteness in DESI Data Release 1, proposing effective mitigation strategies. These contributions are foundational to DESI’s primary science goal: using Baryon Acoustic Oscillations to measure cosmic distances from 40 million galaxies. Carnero Rosell also contributed to the 2022 overview of DESI instrumentation (10 citations), underscoring their role in the survey’s design and execution. Their work ensures that DESI’s unprecedented dataset yields robust, unbiased constraints on dark energy, cementing their impact on the next generation of cosmological discovery.